Firestore, android 연동 오류

Firestore package가 update되면서 최소 sdk version이 16에서 19로 변경된 것 같다.

그래서 안드로이드로 build를 해보려고 하면 에러가 정말 많다.

 

첫번째 에러는 다음과 같았다.

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:processDebugMainManifest'.

Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:cloud_firestore] /Users/kangminlee/Desktop/code/flutter/offline_toy/build/cloud_firestore/intermediates/merged_manifest/debug/AndroidManifest.xml as the library might be using APIs not available in 16 Suggestion: use a compatible library with a minSdk of at most 16, or increase this project's minSdk version to at least 19, or use tools:overrideLibrary="io.flutter.plugins.firebase.firestore" to force usage (may lead to runtime failures)

• Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 45s Running Gradle task 'assembleDebug'... 46.8s

 

내용은 최소 sdk version이 16으로 되어 있어서 firestore와 호환이 안된다는 것이었다. 해결 방안은 app 폴더의 build.gradle을

defaultConfig {
        // TODO: Specify your own unique Application ID (<https://developer.android.com/studio/build/application-id.html>).
        applicationId "com.example.offline_toy"
        // You can update the following values to match your application needs.
        // For more information, see: <https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration>.
        minSdkVersion 19
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

이렇게 minSdkVersion을 19로 바꾸어 주면 됐다.

하지만 또 에러가 났다.

FAILURE: Build failed with an exception.

• Where: Build file '/Users/kangminlee/Desktop/code/flutter/offline_toy/android/build.gradle' line: 26
• What went wrong: A problem occurred evaluating root project 'android'.

A problem occurred configuring project ':app'. Failed to notify project evaluation listener. com.android.builder.errors.EvalIssueException: compileSdkVersion is not specified. Please add it to build.gradle Cannot invoke method substring() on null object

여기서는 compileSdkVersion이 명시되어 있지 않다는 것이었다. 그래서 동일한 파일을

android {
    ndkVersion flutter.ndkVersion
    compileSdkVersion 31
    buildToolsVersion '31.0.0'

이렇게 수정해주었다.

 

Result

https://github.com/growbook91/offline_toy

GitHub - growbook91/offline_toy